package com.cc.utils;

import java.io.OutputStream;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.VerticalAlignment;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

public class ExportExcelUtil {

	private final static Logger logger = Logger.getLogger(ExportExcelUtil.class);
	private final static SimpleDateFormat dateFormat=new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");
	/**
	 * 导出excel
	 * 
	 * @param fileName
	 * @param exportMap
	 * @param listContent
	 * @param response
	 * @return
	 */
	@SuppressWarnings("rawtypes")
	public final static String exportExcel(String fileName, Map<String, String> exportMap,
			List<? extends Object> listContent, HttpServletResponse response) {
		String result = "success";
		// 以下开始输出到EXCEL
		try {
			// 定义输出流，以便打开保存对话框______________________begin
			// HttpServletResponse response=ServletActionContext.getResponse();
			OutputStream os = response.getOutputStream();// 取得输出流
			response.reset();// 清空输出流
			response.setHeader("Content-disposition",
					"attachment; filename=" + new String(fileName.getBytes("GB2312"), "ISO8859-1"));
			// 设定输出文件头
			response.setContentType("application/msexcel");// 定义输出类型
			// 定义输出流，以便打开保存对话框_______________________end

			/** **********创建工作簿************ */
			WritableWorkbook workbook = Workbook.createWorkbook(os);

			/** **********创建工作表************ */

			WritableSheet sheet = workbook.createSheet("Sheet1", 0);

			/** **********设置纵横打印（默认为纵打）、打印纸***************** */
			jxl.SheetSettings sheetset = sheet.getSettings();
			sheetset.setProtected(false);

			/** ************设置单元格字体************** */
			WritableFont NormalFont = new WritableFont(WritableFont.ARIAL, 10);
			WritableFont BoldFont = new WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD);

			/** ************以下设置三种单元格样式，灵活备用************ */
			// 用于标题居中
			WritableCellFormat wcf_center = new WritableCellFormat(BoldFont);
			wcf_center.setBorder(Border.ALL, BorderLineStyle.THIN); // 线条
			wcf_center.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
			wcf_center.setAlignment(Alignment.CENTRE); // 文字水平对齐
			wcf_center.setWrap(false); // 文字是否换行

			// 用于正文居左
			WritableCellFormat wcf_left = new WritableCellFormat(NormalFont);
			wcf_left.setBorder(Border.NONE, BorderLineStyle.THIN); // 线条
			wcf_left.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
			wcf_left.setAlignment(Alignment.LEFT); // 文字水平对齐
			wcf_left.setWrap(false); // 文字是否换行

			/** ***************以下是EXCEL开头大标题，暂时省略********************* */
			// sheet.mergeCells(0, 0, colWidth, 0);
			// sheet.addCell(new Label(0, 0, "XX报表", wcf_center));
			/** ***************以下是EXCEL第一行列标题********************* */
			Object[] columArr = exportMap.keySet().toArray();
			Object[] filedNameArr = exportMap.values().toArray();
			sheet.addCell(new Label(0, 0, "序号", wcf_center));
			for (int i = 0; i < columArr.length; i++) {
				sheet.addCell(new Label(i + 1, 0, columArr[i].toString(), wcf_center));
			}
			/** ***************以下是EXCEL正文数据********************* */
			int i = 1;
			for (Object obj : listContent) {
				int j = 0;
				String fieldNameTemp = null;
				Object value = null;
				Method method=null;
				Class methodTypeClass=null;
				sheet.addCell(new Label(j, i, String.valueOf(i), wcf_left));
				j++;
				for (Object fieldName : filedNameArr) {
					fieldNameTemp = "get" + fieldName.toString().substring(0, 1).toUpperCase()
							+ fieldName.toString().substring(1);
					method = obj.getClass().getMethod(fieldNameTemp, null);
					methodTypeClass = method.getReturnType();
					//时间格式转换
					if (Date.class.getSimpleName().equals(methodTypeClass.getSimpleName())) {
						value = dateFormat.format((Date)method.invoke(obj, null));
					}else{
						value = method.invoke(obj, null);
					}
					if (value == null) {
						value = "";
					}
					sheet.addCell(new Label(j, i, value.toString(), wcf_left));
					j++;
				}
				i++;
			}
			/** **********将以上缓存中的内容写到EXCEL文件中******** */
			workbook.write();
			/** *********关闭文件************* */
			workbook.close();
			logger.info("导出excel成功");

		} catch (Exception e) {
			result = "error";
			logger.error("导出excel失败", e);
		}
		return result;
	}
	
}